Calculator casing



FIG. 1 is a view in perspective of a calculator casing showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a front elevational view thereof.

The side of the casing which is shown is essentially a mere image of the side disclosed in FIGS. 1 and 3. The bottom is plain and conventional. 

The ornamental design for a calculator casing, substantially as shown and described. 